Bunsen burner



F. A. VAN DE ROER 3,333,775

Aug. 1, 1967 BUNSEN BURNER Filed July 6, 1965 IN VENTOR FfiNCifi/(i/S A. VAN Je' RaE ATTORNEY United States Patent 3,333,775 BUNSEN BURNER Franciskus A. van de Roer, 98a Stateusingel, Rotterdam, Netherlands Filed July 6, 1965, Ser. No. 469,800 Claims. (Cl. 239-431) ABSTRACT OF THE DISCLOSURE A gas burner including a head having transversely intersecting slot-like burner openings bounded by flat parallel walls defining secondary air channels between said openings. A bafile is supported within the head in confronting relation to the inlet thereto by means extending into and blocking the intersections of said slotlike openings.

Background of invention This application relates to a Bunsen burner provided with a nozzle element with a mixer pipe connected thereto, inlet apertures for primary air, and a burner head with slot-like gas-exit apertures bounded by parallel flat surfaces over part of the height, spaces for the admission of secondary air being provided between said gas apertures. The disadvantage of such a burner is that it is of a relatively large height. The object of the invention is to provide such a burner which can be made very compact.

Brief description of invention To this end, according to the invention, the mixer pipe is continued to inside the burner head. Subject to the required dimensions of the burner head, the overall burner height is then very small.

According to the invention, a bafile plate may be provided at some distance from the mixer pipe to deflect the current of gas and air laterally. This prevents too much gas from being supplied to those portions of the gas exit apertures which are situated in extension of the mixer pipe.

Also, according to the invention, the baflie plate may be formed with one or more bent-over lips which extend in the direction of the mixer pipe and are situated between the mixer pipe exit aperture and those slot portions which are most readily accessible to the bafliedeflected flow emerging from the mixer pipe. Such a construction is important particularly if long and short intersecting exit slots are used. In such a case, the step according to the invention prevents excessive gas from emerging from the short slots despite the presence of the bathe.

In one advantageous embodiment of the invention, the bent-over lips are bent back and merge into pin-like ends which at the place where intersecting slot portions meet are secured in the exit edges of the slot portions and are at the same time in contact with the ends of the boundary surfaces of those slot portions. The bafile plate can then readily be secured in the burner head by means of the lips and pin-like ends, another advantage being that with this securing system the boundary walls of the slots are reinforced and an excessive cross-section is avoided at the point of intersection of these slot portions.

Brief description of drawings The invention will be explained in detail in the following description of one exemplified embodiment with reference to the drawing wherein:

FIG. 1 is a cross-section through a Bunsen burner according to the invention.

FIG. 2 is a top plan view of the burner according to FIG. 1.

3,333,775 Patented Aug. 1, 1967 "ice Detailed description The Bunsen burner illustrated is provided with a nipple 1 which can be fixed into a gas supply pipe (not shown) by means of a screwthread 2. A nozzle element 3 is screwed into the nipple l. The latter is also formed with apertures 4 for admission of primary air, and a mixer tube 5 for mixing the gas and primary air. A burner head 6 is placed on the mixer tube and is formed With two long gas exit slots 7 and 8 and a slot 9 which intersects said slots 7 and 8. The mixer pipe 5 extends into the burner head 6.

A small baffle 11 is provided at some distance above the exit aperture 10 of the mixer tube 5 and is provided with downwardly bent lips 12 and 13 which are bent up again at approximately the level of the mixer tube 5 exit aperture 10 and merge into pin-shaped arms or ends 14 and 15. These ends 14 and 15 fit into the slots 7, 8 and 9 at the place where said slots intersect. The tops of the ends 14 and 15 are welded to the slot edges. For example, pin-shaped end 15 is secured by the weld 16.

Since the mixer pipe 5 extends to within the burner head 6, the burner may be of a small overall height. The baflle 11 prevents the gas emerging from the exit aperture 10 from escaping via the middle portion of the slots 9, 7 and 8. The lips 12 and 13 prevent an excessive amount of gas from flowing out via the ends of the slot 9 as a result of the lateral deflection of the current of gas and air by the baflle 11. The pin-shaped ends 14 and 15 enable the baffle 11 with the lips 12 and 13 to be readily secured as described hereinbefore. Also, the pins reduce the cross-section of the slots at the point Where the latter intersects. This is favourable as regards the risk of flashback.

What I claim is:

1. In a gas burner assembly including a gas supply nozzle, a mixer pipe connected with said nozzle and having at least one inlet aperture for primary air for mixture with gas from said nozzle, said pipe having an outlet opening, a burner head connected with said mixer pipe to receive a gas-air mixture from said outlet opening, and having slot-like gas-air exit openings, and a bafile plate within said burner head and confronting said mixer pipe outlet opening, the improvement in said bumer head comprising said slot-like openings transversely intersecting each other and being bounded by flat parallel surfaces defining spaces between said openings for the admission of secondary air.

2. The assembly of claim 1 comprising means disposed in said slot-like openings blocking the intersecting portions thereof.

3. The assembly of claim 2 wherein said means constitutes the support for said bafile plate.

4. In a gas burner assembly including a gas supply nozzle, a mixer pipe connected with said nozzle and having at least one inlet aperture for primary air for mixture with gas from said nozzle, said pipe having an outlet opening, a burner head connected with said mixer pipe to receive a gas-air mixture from said outlet opening, and having slot-like gas-air exit openings, and a bafile plate within said burner head and confronting said mixer pipe outlet opening, the improvement in said burner head comprising at least two said slot-like openings being in spaced parallel relation and at least one said slot-like opening transversely intersecting said parallel openings, said slot-like openings being bounded by flat parallel walls defining channels between said openings for the admission of secondary air along the length of said openings, and arms on said baffle plate and extending through the intersections of said slot-like openings to support said baflie plate and block said intersections to prevent the excessive flow of gas air therethrough.

5. The assembly according to claim 4 comprising a pair of lips on said bafiie plate and extending substantially to said mixer pipe on opposite sides of said outlet opening, said lips being aligned with said one transverse slot-like opening to prevent an excessive amount of gasair flowing thereto.

, References Cited UNITED STATES PATENTS 499,731 6/1893 Hartmann et a1. 1---- 239 ss3 729,516 5/1903 Steilberg 239-422 2,026,027 12/1935 Evans 239568 FOREIGN PATENTS 11,302 1894 Great Britain. 830,666 I 3/1960 Great Britain.

EVERETT W. KIRBY, Primary Examiner. 

1. IN A GAS BURNER ASSEMBLY INCLUDING A GAS SUPPLY NOZZLE, A MIXER PIPE CONNECTED WITH SAID NOZZLE AND HAVING AT LEAST ONE INLET APERTURE FOR PRIMARY AIR FOR MIXTURE WITH GAS FROM SAID NOZZLE, SAID PIPE HAVING AN OUTLET OPENING, A BURNER HEAD CONNECTED WITH SAID MIXER PIPE TO RECEIVE A GAS-AIR MIXTURE FROM SAID OUTER OPENING, AND HAVING SLOT-LIKE GAS-AIR EXIT OPENINGS, AND A BAFFLE PLATE WITHIN SAID BURNER HEAD AND CONFRONTING SAID MIXER PIPE OUTLET OPENING, THE IMPROVEMENT IN SAID BURNER HEAD COMPRISING SAID SLOT-LIKE OPENINGS TRANSVERSELY INTERSECTING EACH OTHER AND BEING BOUNDED BY FLAT PARALLEL SURFACES DEFINING SPACES BETWEEN SAID OPENINGS FOR THE ADMISSION OF SECONDARY AIR. 